Dab tsi yog spike harrow?
Dab tsi yog spike harrow?

Video: Dab tsi yog spike harrow?

Video: Dab tsi yog spike harrow?
Video: Hmong new song 2016 - Yog dab tsi - Xub Hluav Taws (Official MV) 2024, Kaum ib hlis
Anonim

A ntsia hlau loj hniav laj yog ib lub vaj txuas uas rub tawm tom qab lub tsheb laij teb. Hom no laj tawm me me indents nyob rau hauv cov av saum toj kawg nkaus rau tawg sod clumps, aerating hauv av, loosening li nyuaj packed av thiab tau txais lub vaj npaj rau cog.

Cia li xav txog qhov no, lub hom phiaj ntawm kev ua liaj ua teb yog dab tsi?

Hauv kev ua liaj ua teb, a laj (feem ntau hu ua ib txheej ntawm luas nyob rau hauv ib tug plurale tantum siab) yog ib qho kev siv rau kev tawg thiab smoothing tawm ntawm cov av. Nyob rau hauv no txoj kev nws yog txawv nyob rau hauv nws cov nyhuv los ntawm plough, uas yog siv rau tob tillage.

Ib sab saum toj no, lub caij nplooj ntoos hlav hniav siv rau dab tsi? A caij nplooj ntoos hlav - hniav harrow, qee zaum hu ua drag harrow, yog ib hom harrow, thiab tshwj xeeb yog hom tine harrow. Ib tug luag harrow tshwj xeeb tshaj yog hais txog ib hom kev cog qoob loo loj heev uas yog siv rau smooth lub hauv av thiab loosen nws tom qab nws tau plowed thiab ntim.

Tsuas yog li ntawd, koj yuav siv lub rake Harrow li cas?

Yog hais tias lub tined sab pem hauv ntej, lub luag harrow yuav ua hauj lwm kom nkag mus rau hauv av kom aerate cov av, tshem tawm cov nroj tsuag thiab npaj seedbeds. Thaum lub ntsej muag du, nws yuav ua haujlwm zoo li a luag lev los npog cov noob thiab chiv, smoothing hauv av, thiab lwm yam.

Leej twg invented lub caij nplooj ntoos hlav hniav harrow?

Ib daim duab peb sab laj , los yog "A". laj , yog thawj zaug siv nyob rau hauv 1600s. Qhov no laj tus tsim tseem yuav luag tsis hloov mus txog thaum tom qab Asmeskas Tsov Rog Tsov Rog. Xyoo 1869 David L. Garver ntawm Michigan patented a caij nplooj ntoos hlav hniav harrow.

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